Digestive Enzyme

Digestive enzymes are s, the glands in the Stomach , the Pancreas , and the glands in the Small Intestine s.

ORAL CAVITY

In the Oral Cavity , Salivary Glands secrete pytalin. It is a type of α-amylase , which digests starch into small segments of multiple Sugar s and into individual soluble sugars. Secreted by small and large Salivary Glands .

Salivary glands also secrete Lysozyme , which kills Bacteria but is not classified as a digestive enzyme.

ESOPHAGUS

There are no digestive enzymes secreted in the Esophagus .

STOMACH

The enzymes that get secreted in the Stomach are called gastric enzymes. These are the following:

Pepsin is the main gastric enzyme. As it breaks Protein s into smaller Peptide fragments, it is a Peptidase .

Gelatinase , degrades type I and type V Gelatin and type IV and V Collagen , which are Proteoglycan s in meat.

Gastric Amylase degrades starch, but is of minor significance.

Gastric Lipase is a Tributyrase by its biochemical activity, as it acts almost exclusively on Tributyrin , a butter fat.

SMALL INTESTINE

Pancreatic enzymes

The Pancreas is the main digestive gland in our body. It secretes the enzymes:

Trypsin , is a peptidase, like pepsin in the stomach.

Chymotrypsin , also a peptidase

Carboxypolypeptidase , splits peptide fragments into individual Amino Acid s. It is a Protease .

Several Elastase s that degrade the protein Elastin and some other proteins.

Several Nuclease s that degrade nucleic acids.

Pancreatic Amylase that, besides starch and Glycogen , degrades also most other Hydrocarbon s, but not Cellulose . Disaccharide s and Trisaccharide s form.

Proper small intestine enzymes

Several peptidases.

Four types of enzymes degrade disaccharides into Monosaccharide s:

Sucrase , which breaks down Sucrose into Glucose and Fructose .

Maltase , which breaks down Maltose into Glucose .

Isomaltase , which breaks down Maltose and Isomaltose .

Lactase , which breaks down Lactose into Glucose and Galactose .

Intestinal Lipase , which breaks down Fatty Acid s.

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Digestive Enzyme